Rocking and dumping grate



June 5, 1923.

C. E. BABBITT ROCKING AND DUMP ING GRATE Fild Oct. 51 1921 In v6 10 7 z 8 f 5% @W Patented-June 5, 1923.

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Application filed October 31, 1921. =S 'i'ia'1 mi. 511,952.

T all whom it mag concern city of South Portland, in the county of Cumberland and State of Maine, have invented new andaiseful Improvements in Rocking and Dumping Grates, of which the following is a specification.

lily invention; relates to improvements in rocking and dumping grates whereby a rocker, or as sometimes called agrate-bar, together'with the assembled parts which go to make up a complete grate, is so constructed as to eliminate all angle-bars, plates, rods or other material essential in the installation of most other grates now on the market,

and providing a product which I am able to install at a minimum of cost and a maximum of simplicity and for which replacements are easily and quickly made.

Describing my grate in a general way I will say it consists of an outsideframcmade up of parts with interlocking joints and sup ported at certain points by the boiler setting or foundation, with no bolts or screws whatever required in securing these parts, either together or to the foundation. Between two of the sides of this frame are a plurality of grate-bars or rockers, so made as to be easily placed in, or taken out of, this frame, with suitable connections to a reciprocating member to produce a rocking movement to bars when required. Interchangeability is a point upon which I lay great stress, as all rockers are similar, side bars alike, also end bars, duplicates, so that in making repairs mistakes are less liable to occur. By double locking the corners of frame, or where side and end bars join, I do away with any possibility of the frame spreading, allowing rockers to drop out of frame or become disarranged.

I attain the object of my invention by the novel design of parts illustrated in the accompanying drawing, in which Fig. 1 is a longitudinal section through a boiler setting showing side bar in part section and the forward end of grate a view taken on lin in Fig. 6; Fig. 2 is a front View of boiler setting showing shaker-mechanism protruding through setting, outside of doors; Fig. 3 is a section through side and center bars, showing method of detaching a rocker from the grate; Fig. 4 is a plan View showing method of securing draw bar to the first and rockersin the grate;

-Fig. 5 is a perspective of one corner of grate section, in rectangular shaped furnace, showing a side'and end bar locked together by a double lock, and parts of three rockersin position, Fig. 6 a cross section on line :lj-fl/ in Fig. 1 Fig. 7 is a detail "of'one end of end-barand Fig. 8 the same of a side-bar.

Similar numerals "refer to similar parts throughout the several views.

In Fig. 1 Ihave shown a conventional.

set-up of a rocking and dumping grate,

partly in section. I l1"are rockers; 2 is anend-bar (forward one shown rearward one not shown); 3. is a side-bar forward part broken oif so as to show rockers in full); 4 is a draw-bar; 5 a shaker shoe, and dis a shaker bar,-connecting, outside of boiler setting to outside shakerl', which is operated by pipe handl 8. A latch 8 is used to hold rockers in a correct position after operation of shaking fire has been completed. 7

Projecting inwardly from side-bars 3 are pins or gudgeons 9, supporting rockers by engaging slotted holes 10; extending downwardly from rocker body are arms 11, from out of which project pins 12, engagin gi in slotted holes 13 indraw-bar 4. I make the first and last holes in draw-bar round instead of slotted or oblong,as I tie draw-bar to the two extreme outside rockers to prevent them from slipping oif from pins 12.

My method of accomplishing this is shown in Fig. 4, in which 14 is a clamp, rigidly secured to draw-bar .L by bolt 15 and confining rocker arm 11 loosely within the offset p013 tion of said clamp. To remove the two rockers connecting with the two extreme outside holes in draw-bar 4 it is first necessary to remove this clamp 14, slip the draw-bar off the pins 12 and remove rocker bylifting it off side-bars.

However, all other rockers in the set can be removed, as seen in Fig. 3, by lifting the inner end, or end opposite the arm ll, thus disengaging the pin 12 from the slotted hole 13, of the draw-bar, 4, and keeping the:

rocker at this angle continue to lift rocker clear of pins 9 and upward until it is Wholly out of the grate space. A new rocker can be as readily installed in the space previously occupied by the'one removed, by reversing, the process. It should benoted that'these end rockers are theones least liable to burn out in use. A

In Fig. l, end-bar 2, which extends across full width of furnace, projects for a few inches into side walls of setting thereby getting its support, and in consequence supporting the whole grate mechanism. At each end of 2 is a cut-down portion 16, on which sidebars 3, having extended or enlarged ends as at 17, rest. Extending out from 16 is a shelf 18, upon which is built up a projection 19. By observing Fig. 5 it will be seen that a perfect locked corner is ob tained by the design herein illustrated,for as the rearward end of 17, at 20, impinges on forward side of 19, at 21, and forward end of 25, at 22, abuts on edge of 2, at 23-and as outer surface of? bears against inner surface of 19, and inner side of 17 against shoulder 2%- of 2, there is no possibility of side or end movement between the end and sidebars.

I am aware of the fact that rocking and dumping grates have been in use for many years, so do not, in a broad sense lay claim to a combination as such; but having described my improvements in the foregoing,

and also of the off-set side shelf portion on the extremities of the end-bars; provided with upwardly extending lugs adapted to abut and shoulder behind and against thickened portions on the ends of said side-bars whereby outward movement of either sidebars or end-bars is prevented, constituting an interlocking corner joint, substantially as illustrated and described.

CHARLES E. BABBITT. 

